Cementing collar and knock-down actuating plugs



Apm'ifl 26, R966 E. E. BAKER 3,24%W5 CEMENTING COLLAR AND KNOCK-DOWNACTUATING PLUGS Filed Nov. 28, 1962 2 Sheets-Sheet 1 INVENTOR.

FUGE/VE E. EAEEE AWvEA/EM E. E. BAKER A miil 2, 1966 CEMENTING COLLARAND KNOCK-DOWN ACTUATING PLUGS 2 Sheets-Sheet 2 Filed Nov. 28, 1962INVENTOR. EUGENE 5 5,4658

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3,247,905 CEMENTING CQLLAR AND KNUCK-DQWN ACIUATING PLUGS Eugene E.Baker, Duncan, Okla, assignor to Hallihurton Company, Duncan, km, acorporation of Delaware Fitted Nov. 28, 1962, Ser. No. 240,486 14Claims. (Cl. 166-494) This invention relates to a cementing collar foruse in a string of well-casing and actuating plugs for opening andclosing ports in the collar. In particular, this inven tion is directedto such a collar for use in multiple-stage cementing operations of oilwells with the actuating plugs being capable of being moved down thewell casing after use, thereby eliminating the need for subsequentlydrillin g or milling through these plugs.

There are numerous situations in the drilling and completion of oil orgas wells wherein it is desirable to cement a well pipe or casing intothe open-well bore. Conventionally, cement slurry is pumped downwardlythrough the well pipe or casing, out the bottom of the well pipe orcasing, and upwardly in the annular space between the well bore and theWell pipe or casing. However, the well casing may be extremely long, andtherefore the cement bond and fill in the upper or medium portions ofthe casing may not be entirely satisfactory. Moreover, occasionally itis highly desirable to obtain a particularly good cement fill and bondin an upper or medium portion of the casing, as well as near the bottomof the casing. Thus, it has become customary under these conditions andre quirements to perform multiple-stage cementing where cement slurry isintroduced into the annulus between the casing and the well bore insuccessive stages at more than one location along the length of thecasing.

There are several types of devices known as cementers or cementingcollars which may be used for introducing cement slurry into the annulusfrom within the well casing at any desired location along the wellcasing. These cementing collars are interposed in the string of wellcasing and have closed ports which may be opened for discharging cementslurry into the annulus and subsequently may be closed.

These opening and closing steps are generally accomplished by droppingor pumping a pair of plugs, bombs, go-devils, or other type devices downthe well casing, the first of which engages a portion of the cementingcollar and opens the ports, and the second of which engages anotherportion of the cementing collar and closes the ports. These plugs orother devices are retained in the cementing collar, and if it issubsequently desired to gain access to the casing below the cementingcollar with any type of piping, tubing, testing devices, or otherapparatus, it is first necessary to drill through these retained plugsor other devices. Since the operation which is to be performed below.suchplugs does not always permit the provision of a drill on the end ofthe string of pipe being lowered to perform such operation, thisdrilling must be conducted as a separate, preceding operation requiringan expensive and time-consuming round trip with a drill and string ofpipe.

Moreover, some cementing collars are provided with parts and elementswhich serve only to prevent rotation of the plugs, etc., that are to bedrilled out and perform no other useful function in the operation of thecementing collar. Thus, the provision of these parts and elementsincreases the cost of the device, which would not be necessary if theplugs or other types of devices used in actuating the cementing collarcould be disposed of by means other than drilling.

Accordingly, by this invention, there is provided a novel cementingcollar and devices for actuating same in which the actuating devices canbe knocked down the itcd tates Patent 0 3,247,905 Patented Apr. 26, 1966well casing by any string of pipe or tubing which is lowered into thecasing for performing additional useful functions, operations, ortesting below the cementing collar.

It is therefore a principal object of this invention to provide a novelform of cementing collar having ports which may be opened and closed bynovel actuating devices, and such devices may be mechanically releasedfrom the cementing collar and knocked through the cementing collar aftercompletion of the cementing operation.

Another object of this invention is to provide a pair of novel actuatingdevices for use with a cementing collar, wherein the first-used devicefor opening the collar is released and knocked through the collar by thesecond-used device when such device reaches the cementing collar, toclose the collar.

A still further object is to provide such a second-used actuating devicethat may be released from the cementing collar and knocked down the wellcasing by the mere imposition of weight on an upper portion of suchdevice.

A further object of this invention is to provide a novel form ofco-operating cementing collar and actuating devices wherein theactuating devices mechanically and affirmatively engage the cementingcollar to open and close the collar, but may be disengaged from thecollar and knocked down the well casing through the proper applicationof mechanical force.

A still further object is to provide such a collar and devices whereinthe collar has a relatively large minimum internal diameter after theactuating devices have been knocked through a collar, thereby allowingconventionally used sizes of piping, tubing, or other devices to passthrough the collar, and wherein a milling cutter may be used on theexterior of such piping, tubing, or other devices for readily enlargingsuch minimum diameter to any desired internal diameter.

Still a further object of this invention is to provide novel devices foractuating a-cementing collar wherein those devices appropriately engagethe cementing collar and may be released therefrom by mere longitudinaldownward movement of a portion of each device.

Other and more detailed objects and advantages of this invention willappear from the following description of the accompanying drawings.

In the drawings:

FIGURE 1 is a sectional elevation of the cementing collar of thisinvention connected in a string of casing and positioned in a well bore,with the ports of the cementing collar closed;

FIGURE 2 is a sectional elevation similar to FIGURE 1, with one of theactuating devices of this invention having served to open the ports ofthe cementing collar;

FIGURE 3 is a sectional elevation similar to FIGURE 2, with the otheractuating device of this invention serving to release the first-usedactuating device and prior to closing the ports in the cementing collar;

FIGURE 4 is a sectional elevation similar to FIGURE 3, showing thefirst-used actuating device of this invention released and dropping downthe well casing and the second-used operating device of this inventionhaving served to close the ports of the cementing collar;

FIGURE 5 is a sectional elevation similar to FIGURE 4, illustrating thesecond-used actuating device of this invention being released from thecementing collar by the application of force from above by the weight ofa string of tubing; and

FIGURE 6 is a sectional elevation similar to FIGURE 5, illustrating amilling operation which may be performed, if desired, by the string oftubing after release of the actuating devices of this invention.

Referring now to the drawings, the cementing collar, generallydesignated 10, of this invention is threaded into a string of casing 11in a conventional manner by upper and lower threads 12 and 13,respectively. The string of easing with the cementing collar is loweredinto the well bore 14 and positioned at the desired location. A firststage of cementing may be conducted in a conventional manner, whereinthe cement slurry is pumped down through the casing 11 and throughcementing collar 10. Conventional top and bottom plugs may be used aboveand below this first stage of cement slurry, and such plugs are adaptedto pass through cementing collar 10 without actuating any of thecomponents thereof. Moreover, it will readily appear to those skilled inthe art that a plurality of cementing stages may be carried on belowcementing collar 10 by using cementing collars similar to collar 10 thathave various components with smaller internal diameters than similarcomponents in collar 10, so that actuating plugs and devices may passthrough illustrated cementing collar 10 without effect and pass on tolower cementing collars for actuating same.

The cementing collar 10 is provided with a cylindrical housing 15 havinga connecting sub 16 containing threads 12 connected to the upper end ofhousing 15 and a connecting sub 17 containing threads 13 connected tothe lower end of housing 15. Housing 15 is provided with a plurality ofports 18, through which the cement slurry will be discharged into theannular space between the well casing 11 and well bore 14 to accomplishthis stage of cementing. An opening sleeve 19 is positioned inisde andin the lower portion of housing 15 but spaced from connecting sub 17.Opening sleeve 19 is maintained in this position by threaded shear pins20 connecting opening sleeve 19 to housing 15. Opening sleeve 19 is ofsufficient length to cover ports 13 when appropriately positioned withshear pins 20 in place. Annular grooves and O-rings 21 are provided onthe exterior of sleeve 19 on each side of ports 18 for completelysealing ports 18 against passage of fluid therethrough in eitherdirection. Sleeve 19 has an internal bore 22 for a portion of its lengthterminating at an inwardly directed shoulder 23 near the lower end ofthe sleeve. An annular seat 24 fits within bore 22 and engages shoulder23 to limit downward movement of the seat relative to the sleeve 19.Annular seat 24 is provided with a tapered shoulder 25 at the upper end.

A closing sleeve 26 is positioned in the upper portion and inside ofhousing 15. Closing sleeve 26 is maintained in the appropriate positionby means of a plurality of threaded shear pins 27 connecting the sleeveto housing 15. Closing sleeve 26 has a major external cylindricalsurface adapted to closely fit the internal cylindrical surface ofhousing 15 with O-ring grooves and seals 28 to accomplish the desiredsealing. The lower portion of sleeve 26 is provided with reducedexternal cylindrical surface 29 adapted to closely fit inside of theupper internal cylindrical surface 30 of opening sleeve 19. O- ringgrooves and seals 31 are provided in surface 29 for accomplishingsealing relationship with internal surface 30 for the purposeshereinafter described. The upper end of closing sleeve 26 is providedwith an external groove 32 of substantial width, wherein there ispositioned a pair of split rings 33 appropriately formed to tend toexpand beyond the internal diameter of housing 15. These rings 33 areretained as shown within groove 32 and confined by the internal surfaceof housing 15. An annular seat 34 is threadedly mounted on the interiorof closing sleeve 26 in the upper portion thereof. Annular seat 34 isprovided with an internal upwardly facing tapered shoulder 35. It is tobe noted that the minimum internal diameter of sleeve 26 and seat 35 iscylindrical surface 36, and such diameter is greater than the diameterof cylindrical surface 37, which similarly is the minimum internaldiameter of sleeve 19 and seat 24. The diameters of cylindrical surfaces36 and 37 are both smaller than the internal diameter of casing 11 orthe internal diameters of any other portion of collar 10.

Moreover, it is noted that the diameters of cylindrical surfaces 36 and37 are sufficiently large to permit the passage therethrough of plugsand other devices used in cementing stages below collar 10.

Referring now more particularly to FIGURE 2, when the previous stages ofcementing have been completed and it is desired to discharge cementthrough ports 18, an opening plug or bomb, generally designated 40, isdropped into casing 11 and is either pumped or falls freely down tocementing collar 10'. Although a bomb 40 is shown and will be described,it is to be understood and will be readily apparent to those skilled inthe art that if it is desirable to use a plug-type device wherein suchdevice is pumped down the casing just below the cement slurry, then bomb40 may be appropriately modified to include the necessary wiper membersto function as a plug. However, bomb 40 shown is of the type that isdropped and falls by gravity through the fluid to a position withincementing collar 10. Opening bomb 4% has a body member 41 withan-internal passage 42 in the lower portion and an internal bore 43 inthe upper portion. A stub mandrel 44 fits into bore 43 and is positionedand secured therein by threaded shear pin 45. Stub mandrel 44 has areduced diameter portion 46 protruding upwardly beyond body 41. Mandrel44 is also provided with an internal bore 47 and lateral passageways 48,communicating therewith. A check-valve assembly 49 is provided in body41 for preventing fluid flow from bore 43 to passage 42, but permittingfluid flow in the reverse direction. Body 41 is provided with aplurality of radial slots or bores 50 adjacent mandrel 44 foraccommodating a plurality of balls 51. A lock ring 52 fits in an annulargroove in body 41 and surrounds the plurality of balls 51. Lock ring 52is a split ring preformed to tend to collapse on balls 51. Balls 51 areradially supported by stub mandrel 44 and, in turn, support lock ring 52such that the outside diameter of the lock ring is greater than theoutside diameter of body 41. i

As bomb 40 reaches cementing collar 10, the various components of thecollar are in the positions shown in FIGURE 1. The outside diameter ofbody 41 is slightly smaller-than cylindrical surface 37 of seat 24, andtherefore the bomb 40 drops into seat 24 until lock ring 52 engagesshoulder 25 of the seat. An annular seal 53 is provided in an annulargroove in the external surface of body 41 and is adapted to fit and sealwith cylindrical surface 37. With bomb 40 resting in seat 24 and openingsleeve 19 still in its original position, fluid pressure is applied inthe casing 11 at ground level, thereby tending to force bomb 40, seat24, and sleeve 19 downwardly with respect to housing 15. When asufficient pressure is imposed, shear pin 20 will be sheared and sleeve19, seat 24, and bomb 40 will move downwardly to the position shown inFIGURE 2, thereby opening ports 18. The check valve 49 prevents anexcessive buildup of pressure below'bomb 40 that would tend to preventthis downward movement and resultant opening of ports 18. The cementslurry may then be pumped down through casing 11 and out through ports18 into the annular space between well bore 14 and the casing.

When the desired amount of cement slurry has been introduced into thecasing to accomplish the desired cement fill, the closing plug,generally designated 60, is inserted on top of the cement slurry andserves the same functionas a conventional top plug. Closing plug 60 isprovided with resilient wiper means 61 for separating the cement slurryfrom the fluid introduced above the plug, as is conventional. Wipermeans 61 is mouned on a body 62, which is in turn slidably mounted on arod 63. Body 62 is threadedly connected to a cage member 64, which isalso slidably mounted on rod 63. However, a threaded shear pin 65connects cage member 64 to rod 63, and therefore cage 64 and body 62 aresecured to rod 63. A stub mandrel 66 is threadedly mounted on the lowerend of rod 63 and is provided with an enlarged portion 67, positionedwithin cage member 64. The external diameters of cage member 64, body63, and stub mandrel 66 are all smaller than the diameter of internalcylindrical surface 36 and therefore may pass therethrough. Cage 64 isprovided with a plurality of radial slots or holes 66 for accommodatinga plurality of balls 69 to support a locking ring 76 in the same manneras the support of locking ring 52, heretofore described. Enlargedportion 67 of mandrel 66 senves to support the balls 69 against radialcompression by ring 70. Ring 70 is split and preformed to tend tocollapse inwardly but, as supported, has a larger external diameter thanthe internal diameter of cylindrical surface 36.

Thus, it may be seen that closing plugs 66 will enter collar and lockingring 70 will enter seat 34 and proceed downwardly until the locking ringengages upwardly, facing shoulder 35 of seat 34. However, prior toengagement of shoulder 35 by locking ring 70, the lower extremity ofstub mandrel 66 will engage the upper end of stub mandrel 44 to resistfurther downward movement of the closing plug 66. Additional fluidpressure is then ap-. plied within casing 11 above plug 66, tending toforce plug 66 downwardly, thereby urging stub mandrel 44 downwardly. Onapplication of suflicient fluid pressure, shear pin 45 will be shearedand stub mandrel 44 will begin to move downwardly in bore 43. Thisintermediate position is shown in FIGURE 3. Slight additional movementwill bring locking ring 70 into engagement with shoulder 35, andapplication of additional fluid pressure will urge seat 34 and closingsleeve 29 downwardly until suflicient pressure is applied to shear pins27. Shearing of pins 27 permits the closing sleeve 26, seat 34, closingplug 60, and stub mandrel 44 all to move downwardly. When stub mandrel44 has moved downwardly with respect to body 411. a sufficient distanceto position the reduced portion 46 of the mandrel adjacent holes 56 andballs 51, the balls will be urged inwardly by locking ring 52, therebycollapsing the ring to the position shown in FIGURE 4 and permitting thebomb 46 to pass through seat 24 and drop down the casing 11. Stubmandrel 44 is provided with bore 47 and lateral passages 48 to permitany fluid passing through check valve 49 to pass through the stubmandrel 44, thereby not preventing the heretofore described downwardmotion. Continued application of fluid pressure in casing 11 above plug60 causes the plug, seat 34, and sleeve 26 to move downwardly to theposition shown in FIGURE 4. In this position the reduced portion 29 ofsleeve 26 fits into the cylindrical surface of opening sleeve 18 andO-rings 26 fit the inner surface of housing 15 above ports 18, tothereby close ports 18 to the passage of fluid in either directiontherethrough. Housing 15 is provided with an internal annular grooveappropriately spaced above ports 18 such that rings 33 expand outwardlyinto groove 71 when sleeve 26 is in the closed position shown in FIG-URE 4. Groove 71 is provided with a downwardly facing shoulder at theupper extremity thereof, so that the uppermost ring 33 engages theshoulder to limit any upward movement of sleeve 26 with respect tohousing 15. Thus it may be seen that ports 18 are closed and sleeve 26is latched in the closed position and confined sufliciently to maintainthis closed relationship.

When it is desired to perform some operation below cementing collar Itor to merely run a string of tubing therethrough, the appropriate tubingor pipe with the desired apparatus is lowered into the casing 11 andengages a cap 72 threadedly mounted at the upper end of rod 63 of theclosing plug 60, the tubing or pipe being generally designated 73. Acertain amount of the weight of the tubing 73 will be supported by plug60 through rod 63, shear pin 65, cage 64 and lock ring 70 engagingshoulder of the closing sleeve 26. -By setting down additional weight ofthe tubing 73 on the rod 63, the pin 65 will be sheared, therebypermitting the rod and stub mandrel 66 to move downwardly relative tothe cage 64 and body 62. When the enlarged portion 67 of mandrel 66 haspassed the holes 68 and balls 69 in cage 64, the balls will be permittedto move inwardly and the lock ring 76 will move inwardly to therebybecome disengaged from shoulder 35, this condition being shown in FIGURE5. Further downward movement of tubing 73 will urge the plug 66 onthrough cementing collar 16 and downwardly in casing 11. The ports 18will remain closed, since closing sleeve 27 is latched in the closedposition by rings 33.

By appropriately adjusting the sizes, materials, and number of each ofthe shear pins 20, 27, 45, and 65, various desirable relationships maybe obtained to enhance and insure the over-all performance of thecementing collar 10, bomb 4t), and closing plug 69. For example, byproviding shear pins 27 with-a much higher shear strength than shearpins 26, it will be possible by observing the fluid pressure applied incasing Ill after bomb 40 has been dropped, to determine whether or notbomb 40 is resting in seat 24 or has hung-up in seat 34. If theappropriate pressure for shearing pins 20 is exceeded without a rapidreduction in pressure by opening ports 18, then it may be concluded thatthere has been some malfunction. Likewise, the shear strength of each ofthe shear pins may be predetermined so that the appropriate pressuresand weight loads which must be applied to cause shearing is known, andtherefore the operation of the cementing collar lit and actuatingdevices can be virtually observed from ground level.

Referring to FIGURE 6, a billing cutter 74 may be provided on the tubing73 that is being lowered into the well, and such cutter 74 may bepositioned anywhere that is convenient along the length of the tubing73. Milling cutter 74 is adapted to mill to a diameter slightly lessthan the internal diameter of the casing 11. The only components ofcementing collar 16 that have a smaller internal diameter than casingllll are the seats 24 and 34. Thus it is preferred to construct seats 24and 34 of a readily millable material, such as aluminum, so that millingcutters 74 may readily pass through cementing collar 10 and leave a fullinternal bore substantially the size of the casing 11.

Thus it may be seen that by this invention there is provided a cementingcollar and actuating device for opening and closing that collar and thatsuch devices are adapted to be knocked out of the cementing collar andurged down the casing, to thereby obviate the need for drilling out suchdevices to gain access to the casing below the cementing collar.Although a particular cementing collar is shown and described, it willbe readily understood by those skilled in the art that variousadaptations may be made on other types of conventional cementing collarsto permit the use of and cooperation with the actuating devices, bomb40, and plug 60, heretofore described. Moreover, it will readily appearto those skilled in the art that various modifications of the specificlocking and unlocking structures described may be made without departingfrom this invention.

Having fully described my invention, it is to be understood that I donot wish to be limited to the details herein set forth or to the detailsillustrated in the drawings, but my invention is of the full scope ofthe appended claims.

I claim:

ll. In a device for actuating an opening or closing sleeve of acementing collar to move such sleeve from a first position to a secondposition, the combination of: a body having an external groove and aninternal bore with apertures between said groove and bore incommunication with said groove and bore, a split lock ring positioned insaid groove, a mandrel positioned in said internal bore, meanspositioned in said apertures and extending between said lock ring andsaid mandrel for preventing inward collapsing of said lock ring, saidlock ring protrud- 1 ing outwardly from said body for engaging a sleeveof the cementing collar for moving that sleeve from the first to secondpositions upon longitudinal movement of said body, and said mandrelmounted in said body for longitudinal movement to a release positionrelative to said body upon application of force from above and havingmeans for permitting both the said means positioned in said aperturesand the said lock ring to collapse inwardly at the said release positionof the mandrel to permit the entire device to pass through the cementingcollar.

2. The combination of claim 1 wherein frangible means are provided andjoin said mandrel and said body to prevent said longitudinal relativemovement until such moving force reaches a predetermined magnitude.

3. In a pair of devices for actuating the opening and closing sleeves ofa cementing collar to move both of such sleeves from first positions tosecond positions, comprising: first and second actuating devices forpassing through the well pipe to the cementing collar, said firstactuating device having lock means for engaging the opening sleeve tomove that sleeve to the second position upon downward movement of saidactuating device, release means mounted in said first actuating devicefor movement from a position for retaining said lock means in engagementwith the opening sleeve to a position for permitting said lock means todisengage from the opening sleeve for allowing said first actuatingmeans to pass through the cementing collar, said second actuating devicehaving lock means for engaging the closing sleeve to move that sleeve tothe second position upon downward movement of said actuating device, andrelease means mounted in said second actuating device for movement froma position for retaining the associated said lock means in engagementwith the closing sleeve to a position for permitting said associatedlock means to disengage from the closing sleeve for allowing said secondactuating means to pass through the cementing collar.

4. The combination of claim 3 wherein both of said release means aremovable to said position for permitting said lock means to disengagefrom the respective sleeve only upon the application of mechanical forceon the respective actuating device from above that actuating device.

5. In a pair of devices for actuating the opening and closing sleeves ofa cementing collar to move both of such sleeves from first positions tosecond positions, comprising: first and second actuating devices forpassing through the well pipe to the cementing collar, said firstactuating device having lock means for engaging the opening sleeve tomove that sleeve to the second position upon downward movement of saidactuating device, release means mounted in said first actuating devicefor movement from a position for retaining said lock means in engagementwith the opening sleeve to a position for permitting said lock means todisengage from the opening sleeve for allowing said first actuatingdevice to pass through the cementing collar, said second actuatingdevice having lock means for engaging the closlng sleeve to move thatsleeve to the second position upon downward movement of said actuatingdevice, means on said second actuating device for engaging and movingsaid release means to disengage the lock means of said first actuatingdevice from the opening sleeve, and release means mounted in said secondactuating device for movement from a position for retaining theassociated said lock means in engagement with the closing sleeve to aposition for permitting said associated lock means to disengage from theclosing sleeve for allowing said second actuating means to pass throughthe cementing collar.

6. In a cementing collar device for Well pipe and a pair of means foractuating that device, comprising: a collar assembly having a tubularhousing with means for attachment to the well pipe, at least one port insaid housing, an opening sleeve means first positioned in said housingfor covering said port and movable to a second position for opening saidport, a closing sleeve means first positioned in said housing and thenmovable to a second position for closing said port after said openingsleeve means has moved to said second position for opening said port,frangible means maintaining said opening sleeve means in said firstposition, and separate frangible means maintaining said closing sleevemeans in said first position; first and second actuating means forpassing through the well pipe to said collar assembly, said firstactuating means having lock means for engaging and moving said openingsleeve means to said second position upon downward movement of saidactuating means, release means mounted in said first actuating means formovement from a position for retaining said lock means in engagementwith said opening sleeve means to a position for permitting said lockmeans to disengage from the opening sleeve means for allowing said firstactuating means to pass through said collar assembly, said secondactuating means having lock means for engaging and moving said closingsleeve means to said position upon downward movement of said actuatingmeans, and release means mounted in said second actuating means formovement from a position for retaining the associated said lock means inengagement with said closing sleeve means to a position for permittingsaid associated lock means to disengage from the closing sleeve meansfor allowing said second actuating means to pass through said collarassembly.

7. In a cementing collar device for well pipe and a pair of means foractuating that device, comprising: a collar assembly having atubularhousing with means for attachment to the well pipe, at least oneport in said housing, an opening sleeve means first positioned in saidhousing for covering said port and movable to a second position foropening said port, a closing sleeve means first positioned in saidhousing and then movable to a second position for closing said portafter said opening sleeve means has moved to said second position foropening said port, frangible means maintaining said opening sleeve meansin said first position, and separate frangible means maintaining saidclosing sleeve means in said first position; first and second actuatingmeans for passing through the well pipe to said collar assembly, saidfirst actuating means having lock means for engaging and moving saidopening sleeve means to said second position upon downward movement ofsaid actuating means, release means mounted in said first actuatingmeans for movement from a position for retaining said lock means inengagement with said opening sleeve means to a position for permittingsaid lock means to disengage from the opening sleeve means for allowingsaid first actuating means to pass through said collar assembly, meansin said first actuating means for preventing said movement of saidrelease means until mechanical force is applied from above said firstactuating means, said second actuating means having lock means forengaging and moving said closing sleeve means to said second positionupon downward movement of said actuating means, release means mounted insaid second actuating means for movement from a position for retainingthe associated said lock means in engagement with sail closing sleevemeans to a position for permitting said associated lock means todisengage from the closing sleeve means for allowing said secondactuating means to pass through said collar assembly, and means in saidsecond actuating means for preventing said movement of thelast-mentioned release means until mechanical force is applied fromabove said second actuating means.

d. In a cementing collar device for well pipe and a pair of means foractuating that device, comprising: a collar assembly having a tubularhousing with means for attachment to the well pipe, at least one port insaid housing, and opening sleeve means first positioned in said housingfor covering said port and movable to a second position for opening saidport, a closing sleeve means first positioned in said housing and thenmovable to a second position for closing said port after said openingsleeve means has moved to said second position for opening said port,frangible means maintaining said opening sleeve means in said firstposition, and separate frangible means maintaining said closing sleevemeans in said first position; first and second actuating means forpassing through the well pipe to said collar assembly, said firstactuating means having lock means for engaging and moving said openingsleeve means to said second position upon downward movement of saidactuating means, release means mounted in said first actuating means formovement from a position for retaining said lock means in engagementwith said opening sleeve means to a position for permitting saidlockmeans to disengage from the opening sleeve means for allowing said firstactuating means to pass through said collar assembly, said secondactuating means having lockmeans for engaging and moving said closingsleeve means to said second position upon downward movement of saidactuating means, means on said second actuating means for engaging andmoving said release means to disengage the lock means of said firstactuating means, and release means mounted in said second actuatingmeans for movement from a position for retaining associated said lockmeans in engagement with said closing sleeve means to a position forpermitting said associated lock means to disengage from the closingsleeve means for allowing said second actuating means to pass throughsaid collar assembly.

9. In a cementing collar device and actuating means, the combination of:a tubular sleeve mounted in the cementing collar for limited relativemovement between first and second positions, said sleeve having aninternal upwardly facing shoulder, said sleeve having an internalcylindrical surface, an actuating device for passing through the wellpipe to the cementing collar, said actuating device having a body of asize for passing through said sleeve, lock means mounted on said bodyand having outwardly protruding means for engaging said upwardly facingshoulder of said sleeve, means on said body for sealing with saidcylindrical surface of said sleeve for fluid pressure imposed above saidactuating device to urge said sleeve from said first position to saidsecond position, and a mandrel mounted in said body for longitudinalmovement relative to said body upon the application of mechanicallongitudinal force on said mandrel, said mandrel having means forpermitting inward movement of said lock means upon said longitudinalmovement of said mandrel relative to said body for disengaging said lockmeans from said sleeve shoulder to permit the actuating device to passthrough said sleeve.

10. The combination of claim 9 wherein frangible means joins said sleeveand the cementing collar in said first position for preventing movementto said second position until the fluid pressure imposed above theactuating device reaches a predetermined magnitude.

11. The combination of claim 9 wherein frangible means joins the saidmandrel to said body for preventing relative longitudinal movementtherebetween until such mechanical force reaches a predeterminedmagnitude.

12. The combination of claim 9 wherein said lock means includes a splitring having a normal outside diameter at least smaller than the minimuminternal diameter of said sleeve, and a plurality of movable means arepositioned in said body between and engage said ring and said manrel forretaining said ring in the outwardly protruding position for engagingsaid shoulder.

13. In a device for actuating a downwardly movable opening or closingsleeve of a remotely located cementing collar to move such sleeve from afirst position to a second lower position wherein the sleeve has anupwardly facing exposed shoulder, the combination of: a tubular body,lock means mounted on said body and having outwardly protruding meansfor engaging said upwardly facing exposed shoulder of the sleeve of thecementing collar upon downward movement of the body into the cementingcollar for transmitting downward force on the body to the sleeve, meansfor. sealing between the said body and the sleeve, and a mandrel mountedin said body for longitudinal movement relative to said body uponapplication of mechanical force from above and having means forpermitting disengagement of said lock means from the sleeve shoulderupon such longitudinal movement to permit the device to pass through thecementing collar.

14. The combination of claim 13 wherein frangible means join saidmandrel and said body for preventing said longitudinal relative movementtherebetween until such moving force reaches a predetermined magnitude.

References Cited by the Examiner UNITED STATES PATENTS 2,925,865 2/1960Oliver 166-154 3,042,116 7/1962 Sharp et al. 166224 3,044,553 7/1962Bradley 166-184 CHARLES E. OCONNELL, Primary Examiner.

1. IN A DEVICE FOR ACTUATING AN OPENING OR CLOSING SLEEVE OF A CEMENTINGCOLLAR TO MOVE SUCH SLEEVE FROM A FIRST POSITION TO A SECOND POSITION,THE COMBINATION OF: A BODY HAVING AN EXTERNAL GROOVE AND AN INTERNALBORE WITH APERTURES BETWEEN SAID GROOVE AND BORE IN COMMUNICATION WITHSAID GROOVE AND BORE, A SPLIT LOCK RING POSITIONED IN SAID GROOVE, AMANDREL POSITIONED IN SAID INTERNAL BORE, MEANS POSITIONED IN SAIDAPERTURES AND EXTENDING BETWEEN SAID LOCK RING AND SAID MANDREL FORPREVENTING INWARD COLLAPSING OF SAID LOCK RING, SAID LOCK RINGPROTRUDING OUTWARDLY FROM SAID BODY FOR ENGAGING A SLEEVE OF THECEMENTING COLLAR FOR MOVING THAT SLEEVE FROM THE FIRST TO SECONDPOSITIONS UPON LONGITUDINAL MOVEMENT OF SAID BODY, AND SAID MANDRELMOUNTED IN SAID BODY FOR LONGITUDINAL MOVEMENT TO RELEASE POSITIONRELATIVE TO SAID